using BPA.Helper;

using BPASmartDatavDeviceClient.IoT;
using DataVAPI.Tool.IOT;
using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using static AlibabaCloud.SDK.Iot20180120.Models.QueryDeviceFileResponseBody;

namespace BPASmartClient.IoT.Model
{
    /// <summary>
    /// 阿里云文件上传
    /// </summary>
    public class FileUpload
    {
        public static string FileName = $"HBL.LogDir{DateTime.Now.ToString("yyyy_M_d")}";
        public static string path = $"{System.AppDomain.CurrentDomain.BaseDirectory}LogDir\\{FileName}.log";
        /// <summary>
        /// 一次性上传的包
        /// </summary>
        public static byte[] FileBlock;
        /// <summary>
        /// 请求反馈信息
        /// </summary>
        public static FileUploadModelResult modelResult = null;
        /// <summary>
        /// 文件请求上传
        /// </summary>
        public static void FileRequest(DataVReport dataV)
        {
            TaskManage.GetInstance.Start(new Action(() =>
            {
                try
                {
                    List<QueryDeviceFileResponseBodyData> queryDeviceFiles = Sample.FileQueryALL(DataVClient.GetInstance().DeviceName);
                    QueryDeviceFileResponseBodyData _data = queryDeviceFiles?.Find(par => par.Name == FileName);
                    if (_data != null)//删除文件
                    {
                        MessageLog.GetInstance.Show("阿里云设备下文件已存在,准备删除续传...");
                        Sample.DeleteFile(DataVClient.GetInstance().DeviceName, _data.FileId);
                        MessageLog.GetInstance.Show("删除成功.准备上传..");
                    }
                    byte[] FileBlockALL = FileContent(path);
                    //分包上传
                    int length = FileBlockALL.Count();
                    int bfb = (FileBlockALL.Count() / 130000) + 1;
                    MessageLog.GetInstance.Show($"[阿里云上传]:文件整理中总长度[{length}]字节,分包数[{bfb}]包.");
                    //分包上传
                    for (int i = 0; i < bfb; i++)
                    {
                        modelResult = null;
                        byte[] data;
                        if (i == bfb - 1) data = new byte[FileBlockALL.Count() - i * 130000];//最后一包
                        else data = new byte[130000];//前面的包

                        for (int k = 0; k < data.Length; k++)
                        {
                            data[k] = FileBlockALL[k + i * 130000];
                        }
                        FileBlock = data;

                        FileUploadModel fileUpload = new FileUploadModel();
                        fileUpload.@params.fileName = FileName;
                        fileUpload.@params.fileSize = -1;

                        fileUpload.@params.conflictStrategy = length > 130000 ? "append" : "overwrite";
                        //fileUpload.@params.conflictStrategy = "append";// "overwrite";//覆盖模式
                        //fileUpload.@params.ficMode = "crc64";
                        //fileUpload.@params.ficValue = CRC.ToCRC16(FileBlock);
                        fileUpload.@params.initUid = $"ab{RandomHelper.GenerateRandomCode()}";

                        //上传到阿里云物联网平台的OSS存储空间中
                        fileUpload.@params.extraParams.ossOwnerType = "iot-platform";

                        //表示上传到设备所属用户自己的OSS存储空间中
                        //{ossbucket}/aliyun-iot-device-file/${instanceId}/${productKey}/${serviceId}/${deviceName}/${fileName}
                        //fileUpload.@params.extraParams.ossOwnerType = "device-user";
                        //fileUpload.@params.extraParams.serviceId = "black";
                        //fileUpload.@params.extraParams.fileTag = new Dictionary<string, string> { {"Time", DateTime.Now.ToString("yyyy_M_d") },{"Name", "HBL.LogDir" } };

                        dataV.IOT_Publish(dataV.FileUpLoadTopic, Tools.JsonConvertTools(fileUpload));
                        //MessageLog.GetInstance.Show($"[阿里云上传]:第[{i+1}]包数据,请求上传.");

                        int count = 0;
                        while (modelResult == null)//等待上传完成
                        {
                            if (count > 5)
                            {
                                MessageLog.GetInstance.Show($"[阿里云上传]:超时上传、未知原因、退出线程.");

                                return;
                            }
                            Thread.Sleep(3000); count++;
                        }

                        ;

                        if (modelResult.code == 200)
                        {
                            if (modelResult.data.complete)
                            {
                                MessageLog.GetInstance.Show($"[阿里云上传]:文件上传完成,总长度[{modelResult.data.bSize}]字节.");
                            }
                        }
                        else
                            MessageLog.GetInstance.Show($"[阿里云上传]:第[{i + 1}]包,上传失败.原因：{modelResult.message}");
                        ;
                    }
                }
                catch (Exception ex)
                {
                    MessageLog.GetInstance.ShowEx(ex.ToString());
                }
            }), "文件请求上传", isRestart: false);
        }

        /// <summary>
        /// 文件上传
        /// </summary>
        public static void FileSend(DataVReport dataV, string uploadId, long offset)
        {
            FileSendModel fileSend = new FileSendModel();
            fileSend.@params.uploadId = uploadId;
            fileSend.@params.offset = offset;
            fileSend.@params.bSize = FileBlock.Count();
            fileSend.@params.isComplete = FileBlock.Count() == 130000 ? false : true;
            //结构如下图
            //Header.length(高 低) + Header(字节数组UTF-8) + 文件分片的字节数组 + "分片校验值CrC16 低 高" 
            byte[] Header = Encoding.UTF8.GetBytes(Tools.JsonConvertTools(fileSend));
            byte HeaderLen_L = (byte)(Header.Length);
            byte HeaderLen_H = (byte)(Header.Length >> 8);
            byte[] CRC16 = CRC16Standard.getCRCBytes(FileBlock);//CRC.CRC16(FileBlock);
            List<byte> message = new List<byte>() { HeaderLen_H, HeaderLen_L };
            message.AddRange(Header);
            message.AddRange(FileBlock);
            message.AddRange(CRC16);
            dataV.IOT_Publish(dataV.FileUpLoadSendTopic, message.ToArray());
        }

        /// <summary>
        /// 取消文件上传
        /// </summary>
        public static void FileCancelSend(DataVReport dataV, string uploadId)
        {
            CancelSend cancel = new CancelSend(uploadId);
            dataV.IOT_Publish(dataV.CancelFileUpLoadSendTopic, Tools.JsonConvertTools(cancel));
        }


        /// <summary>
        /// 读取文件
        /// </summary>
        /// <param name="fileName"></param>
        /// <returns></returns>
        private static byte[] FileContent(string fileName)
        {
            using (FileStream fs = new FileStream(fileName, FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
            {
                try
                {
                    byte[] buffur = new byte[fs.Length];
                    fs.Read(buffur, 0, (int)fs.Length);
                    return buffur;
                }
                catch (Exception ex)
                {
                    return new byte[0];
                }
            }
        }
        /// <summary>
        /// 读取文件字节
        /// </summary>
        /// <param name="path"></param>
        /// <returns></returns>
        public static byte[] ReadFile(string path)
        {
            //创建d:\file.txt的FileStream对象
            FileStream fstream = new FileStream($@"{path}", FileMode.OpenOrCreate);
            byte[] bData = new byte[fstream.Length];
            //设置流当前位置为文件开始位置
            fstream.Seek(0, SeekOrigin.Begin);

            //将文件的内容存到字节数组中（缓存）
            fstream.Read(bData, 0, bData.Length);
            string result = Encoding.UTF8.GetString(bData);
            Console.WriteLine(result);
            if (fstream != null)
            {
                //清除此流的缓冲区，使得所有缓冲的数据都写入到文件中
                fstream.Flush();
                fstream.Close();
            }
            return bData;
        }
    }

    #region 请求上传文件
    /// <summary>
    /// 请求上传文件
    /// </summary>
    public class FileUploadModel
    {
        /// <summary>
        /// 消息ID号
        /// 0~4294967295
        /// </summary>
        public string id { get; set; }
        /// <summary>
        /// 请求业务参数
        /// </summary>
        public BusinessParameters @params { get; set; }

        public FileUploadModel()
        {
            id = RandomHelper.GenerateRandomCode();
            @params = new BusinessParameters();
        }
    }

    /// <summary>
    /// 业务参数
    /// </summary>
    public class BusinessParameters
    {
        /// <summary>
        /// 设备上传文件的名称
        /// </summary>
        public string fileName { get; set; }
        /// <summary>
        /// 上传文件大小，单位字节。单个文件大小不超过16 MB。
        /// 取值为-1时，表示文件大小未知。文件上传完成时，需在上传文件分片的消息中，指定参数isComplete
        /// </summary>
        public long fileSize { get; set; }
        /// <summary>
        /// 物联网平台对设备上传同名文件的处理策略,默认为overwrite
        /// overwrite：覆盖模式 append：文件追加模式 reject：拒绝模式
        /// </summary>
        public string conflictStrategy { get; set; } = "overwrite";
        /// <summary>
        /// 文件的完整性校验模式，目前可取值crc64 
        /// 若不传入，在文件上传完成后不校验文件完整性
        /// </summary>
        public string ficMode { get; set; }
        /// <summary>
        /// 文件的完整性校验值，是16位的Hex格式编码的字符串
        /// </summary>
        public string ficValue { get; set; }
        /// <summary>
        /// 自定义的设备请求上传文件的任务唯一ID，同一上传任务请求必须对应相同的唯一ID
        /// 不传入：物联网平台的云端识别当前请求为新的文件上传请求
        /// </summary>
        public string initUid { get; set; }
        /// <summary>
        /// 设备上传文件至OSS存储空间的配置参数
        /// </summary>
        public ConfigureParameters extraParams { get; set; } = new ConfigureParameters();
    }
    /// <summary>
    /// 配置参数
    /// </summary>
    public class ConfigureParameters
    {
        /// <summary>
        /// 设备上传文件的目标OSS所有者类型
        /// iot-platform：表示上传到阿里云物联网平台的OSS存储空间中
        /// device-user：表示上传到设备所属用户自己的OSS存储空间中
        /// </summary>
        public string ossOwnerType { get; set; } = "device-user";
        /// <summary>
        /// 文件上传相关的业务ID
        /// </summary>
        public string serviceId { get; set; }
        /// <summary>
        /// 标签
        /// </summary>
        public Dictionary<string, string> fileTag { get; set; }
        public ConfigureParameters()
        {

        }
    }
    #endregion

    #region 请求上传文件响应
    /// <summary>
    /// 请求响应
    /// </summary>
    public class FileUploadModelResult
    {
        /// <summary>
        /// 消息ID号
        /// 0~4294967295
        /// </summary>
        public string id { get; set; }
        /// <summary>
        /// 结果码。返回200表示成功
        /// </summary>
        public int code { get; set; }
        /// <summary>
        /// 请求失败时，返回的错误信息
        /// </summary>
        public string message { get; set; }
        /// <summary>
        /// 返回设备端的数据。
        /// </summary>
        public ResultData data { get; set; }

    }
    /// <summary>
    /// 请求响应数据
    /// </summary>
    public class ResultData
    {
        /// <summary>
        /// 设备上传文件的名称
        /// </summary>
        public string fileName { get; set; }
        /// <summary>
        /// 本次上传文件任务的标识ID。后续上传文件分片时，需要传递该文件标识ID。
        /// </summary>
        public string uploadId { get; set; }
        /// <summary>
        /// 仅当请求参数conflictStrategy为append，且物联网平台云端存在未完成上传的文件时，返回的已上传文件的大小，单位为字节。
        /// </summary>
        public long offset { get; set; }
        /// <summary>
        /// 当前上传文件分片的大小
        /// </summary>
        public long bSize { get; set; }
        /// <summary>
        /// 当上传了最后一个分片数据后，文件上传完成
        /// </summary>
        public bool complete { get; set; }
        /// <summary>
        /// 文件的完整性校验模式。若请求上传文件时传入了该参数，对应的值仅支持为crc64
        /// </summary>
        public string ficMode { get; set; }
        /// <summary>
        /// 文件上传完成，返回设备请求上传文件时的
        /// </summary>
        public string ficValueClient { get; set; }
        /// <summary>
        /// 文件上传完成，返回物联网平台云端计算的文件完整性校验值。该值与ficValueClient值相同，表示文件上传完整。
        /// </summary>
        public string ficValueServer { get; set; }
    }
    #endregion

    #region 上传文件
    public class FileSendModel
    {
        /// <summary>
        /// 消息ID号
        /// 0~4294967295
        /// </summary>
        public string id { get; set; }
        /// <summary>
        /// 上传业务参数
        /// </summary>
        public SendBusinessParameters @params { get; set; } = new SendBusinessParameters();
        public FileSendModel()
        {
            id = RandomHelper.GenerateRandomCode();
        }
    }
    /// <summary>
    /// 上传业务参数
    /// </summary>
    public class SendBusinessParameters
    {
        /// <summary>
        /// 设备请求上传文件时返回的文件上传任务标识ID。
        /// </summary>
        public string uploadId { get; set; }
        /// <summary>
        /// 已上传文件分片的总大小，单位为字节。
        /// </summary>
        public long offset { get; set; }
        /// <summary>
        /// 当前上传文件分片的大小，单位为字节
        /// </summary>
        public long bSize { get; set; }
        /// <summary>
        /// 仅当设备请求上传文件中fileSize为-1，即文件大小未知时，该参数有效，表示当前分片是否是文件的最后一个分片
        /// </summary>
        public bool isComplete { get; set; } = true;
    }
    #endregion

    #region 取消文件上传
    /// <summary>
    /// 取消上传
    /// </summary>
    public class CancelSend
    {
        /// <summary>
        /// 消息ID号
        /// 0~4294967295
        /// </summary>
        public string id { get; set; }
        /// <summary>
        /// 请求业务参数
        /// </summary>
        public object @params { get; set; }

        public CancelSend(string uploadId)
        {
            id = RandomHelper.GenerateRandomCode();
            @params = new { uploadId = uploadId };
        }
    }
    #endregion

    public class RandomHelper
    {
        /// <summary>
        ///生成制定位数的随机码（数字）
        /// </summary>
        /// <param name="length"></param>
        /// <returns></returns>
        public static string GenerateRandomCode(int length = 10)
        {
            var result = new StringBuilder();
            for (var i = 0; i < length; i++)
            {
                var r = new Random(Guid.NewGuid().GetHashCode());
                result.Append(r.Next(0, 10));
            }
            return result.ToString();
        }
    }
}